I know it's not allowed but I used Bovril cubes whilst on sole source and it didn't hamper my weight loss....They also make the spicy tomato soup drinkable..
But boullion is nice it is a stock drink but you can have it as a drink, I have this when I feel like something savoury. u will find it in asda or tesco near the oxo cubes...
OK I know it's supposed to cause water retention due to salt content, but in theory, you would still be losing weight, and once you stopped drinking the bovril you would lose the retained water anyway?
It's getting me through my first few days and I know I might not lose a lot in my first week, but I am persevering, and will lose the fat, but I am prepared for a little water retention too.